Finding the Fourth Proportional to 3,810.34, 5,673.87 and 3,670.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,810.34 : 5,673.87 = 3,670.21 : x
2. Step 2: Convert to fraction form
   3,810.34/5,673.87 = 3,670.21/x
3. Step 3: Cross multiply
   3,810.34x = 5,673.87 × 3,670.21
4. Step 4: Simplify right side
   3,810.34x = 20,824,276.06
5. Step 5: Solve for x
   x = 20,824,276.06/3,810.34
6. Step 6: Final answer
   x = 5,465.21